| 摘要 |
A pneumatic tape reader for generating control programs from a punched tape includes a supply head, a reader head, a stepping motor to drive an advance sprocket and a tape-retaining lever pivotally attached to the supply head. A pressure pulse supplied to the stepping motor advances the tape, the advance occurring only on pneumatic pulse discharge. The retaining lever acts to retain the tape against the sprocket and also is adapted to lock the tape in a substantially fluidtight position between the supply head and reader head.
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